双敏化作用下分子内三重态-三重态湮灭上转换的研究。

IF 4.8 2区化学 Q2 CHEMISTRY, PHYSICAL

The Journal of Physical Chemistry Letters Pub Date : 2025-05-15 DOI:10.1021/acs.jpclett.5c00606

Aoi Haraguchi,Kenichi Goushi,Shoma Sasaki,Chihaya Adach

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引用次数: 0

摘要

使用由两个蒽单元组成的二聚体的分子内三重-三重湮灭上转换（TTU）比分子间TTU具有明显的优势，因为它可以在稀释状态下实现上转换。然而，分子内TTU发生的明确证据仍然不足。在本研究中，我们重点研究了双敏化机制，这是由三重态敏化剂向二聚体的双三重态能量转移引起的。这是分子内TTU固有的现象。在双致敏机制占主导地位的条件下，我们通过研究TTU现象对二聚体浓度的依赖，为分子内TTU的存在提供了直接证据。

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Investigation of Intramolecular Triplet-Triplet Annihilation Upconversion by Double Sensitization.

Intramolecular triplet-triplet annihilation upconversion (TTU) using dimers composed of two anthracene units has distinct advantages over intermolecular TTU, as it can enable upconversion even in diluted states. However, clear evidence of the occurrence of intramolecular TTU remains insufficient. In this study, we focus on the double-sensitization mechanism, which is caused by double triplet energy transfer from triplet sensitizers to the dimers. It is a phenomenon inherent in intramolecular TTU. We provide direct evidence of intramolecular TTU by investigating the dependence of the TTU phenomenon on dimer concentration under conditions where the double-sensitization mechanism is dominant.

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来源期刊

The Journal of Physical Chemistry Letters CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

9.60

自引率

7.00%

发文量

1519

审稿时长

1.6 months

期刊介绍： The Journal of Physical Chemistry (JPC) Letters is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, chemical physicists, physicists, material scientists, and engineers. An important criterion for acceptance is that the paper reports a significant scientific advance and/or physical insight such that rapid publication is essential. Two issues of JPC Letters are published each month.